Colm McGuinness is an Ireland-based composer. For Critical Role, he wrote the music playing during the episode breaks in the second and the third campaigns ("Welcome to Wildemount", "Welcome to Marquet"). He stitched together "The Adventure Begins…" and "Welcome to Tal'Dorei" compositions for the album of the same name.
Colm McGuinness also composed episode openings for Exandria Unlimited and the socially distanced version of Talks Machina. He played violin on the first version of the song Your Turn To Roll, and provided the battle music used in "Long May He Reign", as well as an accompaning intro and outro.